vaapipostproc: fix csc fail when only change width or height.

6 jobs for csc_fail in 29 minutes and 25 seconds (queued for 1 second)
Status Job ID Name Coverage
  Preparation
passed #64792
gst indent

00:00:23

passed #64791
manifest

00:00:26

 
  Build
passed #64793
build fedora x86_64

00:03:28

 
  Test
passed #64794
check fedora

00:15:33

 
  Full Builds
passed #64795
build android arm64 api28

00:03:07

passed #64796
build cerbero fedora x86_64

00:09:57